This is for 1993 Audi 90s, my cruise control doesnt work, could it be my cruise vacuum pump? How can i test if my vacuum pump works right?

did you check the repair manual .... you could get a hand vacum pump and check the cruise control vacum lines for leaks ... themanual should tell you how to check the whole deal

no i dont have a repair manual. if i get a hand vacuum pump what should the normal pressure be?

just see if the cruise control lines hold vacum ... pump hte pump to 15-20 units, i forget what the vavum units are called